.Index{
    height:calc(100vh);
    width: 100%;
    overflow: hidden;
    .right_showContent{
        display: block;
        width:calc(100% - 256px);
        float: left;
        .Header{
            width:100%;
            margin-bottom:10px;
            border-bottom:1px solid #ccc;
        }
    }
    .Menu{
        float: left;
        height:100%;
        background:#001529;
    }
   
}